How Life Began. http://cmex.ihmc.us/VikingCD/Puzzle/Evolife.htm. 1. Physical and Chemical Characteristics. A. Early atmosphere was thicker with carbon dioxide and red in color. B. The ocean was olive in color C. Great Bombardment Asteroid/meteorite bombardment created harsh conditions.
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Chemosynthetic bacteria: use Hydrogen Sulfide for energy source; survives in snotites or in phlemballs.